Derived units

By dimensionally appropriate multiplication and/or division of the units shown above, derived units are obtained. Some of these are given special names.

Physical Quantity	Unit name	Unit Symbol	Derivation
Electric Capacitance	farad	F	(A2s4)(kgm2)
Electric charge	coulomb	C	As
Electric Conductance	siemens	S	(A2s3)/(kgm2)
Electric potential difference	volt	V	(kgm2)/(As3)
Electric resistance	ohm	Ω	(kgm2)/ (A2s3)
Energy	joule	J	(kgm2)/s2
Force	newton	N	(kg m)/s2
Frequency	hertz	Hz	1/s
Illuminance	lux	lx	(cd sr)/m2
Inductance	henry	H	(kgm2)/ (A2s2)
Luminous flux	lumen	lm	cd sr
Magnetic flux	weber	Wb	(kgm2)/ (As2)
Magnetic flux density	tesla	T	kg/ (As2)
Power	watt	W	(kgm2)/s3
Pressure	pascal	Pa	kg/ (ms2)

 

Some other derived units not having special names.

Physical Quantity	Unit	Unit symbol
Acceleration	metre per second squared	m/s2
Angular velocity	radian per second	rad/s
Area	square metre	m2
Current density	ampere per square metre	A/m2
Density	kilogram per cubic metre	kg/m3
Dynamic viscosity	pascal second	Pa s
Electric charge density	coulomb per cubic metre	C/m3
Electric field strength	volt per metre	V/m
Energy density	joule per cubic metre	J/m3
Heat capacity	joule per kelvin	J/K
Heat flux density	watt per square metre	W/m2
Kinematic viscosity	square metre per second	m2/s
Luminance	candela per square metre	cd/m2
Magnetic field strength	ampere per metre	A/m
Moment of force	newton metre	N m
Permeability	henry per metre	H/m
Permittivity	farad per metre	F/m
Specific volume	cubic metre per kilogram	m3/kg
Surface tension	newton per metre	N/m
Thermal conductivity	watt per metre kelvin	W/(mK)
Velocity	meter per second	m/s
Volume	cubic metre	m3